In any redox reaction, the substance that undergoes reduction will(1) lose electrons and have a decrease in oxidation number
(2) lose electrons and have an increase in oxidation number
(3) gain electrons and have a decrease in oxidation number
(4) gain electrons and have an increase in oxidation number
Answers
redox reactions deal with the transfer of electrons from one species to another species
redox reactions are made of reduction reactions and oxidation reactions
reduction reactions are when electrons take in electrons and results in a decrease in the oxidation number
oxidation reactions are when electrons give out electrons resulting in an increase in the oxidation number
therefore correct answer for reduction reactions are
(3) gain electrons and have a decrease in oxidation number
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1) 513.4 m to cmChemistry
Answers
Answer:
False
Explanation:
Activation energy is the minimum amount of energy required for a reaction to proceed. Hence, for a reaction (endothermic and exothermic) to occur/proceed, the activation energy must be met. This is because, a reaction is only endothermic or exothermic when the reaction has started/occurred. If the activation energy is not produced, there will be no reaction in the first place.
NOTE: Exothermic reaction is a reaction that involves the release of energy (heat or light) into the surroundings. While endothermic reaction is a reaction that requires the input of energy or it absorbs energy from the environment.
Answers
Ideal Gas Law:
pressure * volume = (number of moles of gas) * (0.08206) * (temperature)
or short-hand:
PV = nRT
this equation can be transformed to solve for temperature as:
T = PV / nR
given there is no change in pressure and the volume of the container has increased, we know the temperature increases because volume is in the numerator--a larger number on top reflects an overall greater number.
B) It has increased slightly
Answers
The element with the electron configuration 1s² 2s² 2p⁶ 3s² 3p² is silicon (Si).
In the electron configuration notation, each number and letter represents a specific energy level (or shell) and subshell that contains electrons in an atom. The numbers indicate the energy levels (principal quantum numbers), and the letters represent the type of subshell (s, p, d, or f).
Let's break down the electron configuration for silicon (Si):
1s²: This indicates that the first energy level (n = 1) has two electrons in the s subshell.
2s²: This indicates that the second energy level (n = 2) has two electrons in the s subshell.
2p⁶: This indicates that the second energy level (n = 2) has six electrons in the p subshell.
3s²: This indicates that the third energy level (n = 3) has two electrons in the s subshell.
3p²: This indicates that the third energy level (n = 3) has two electrons in the p subshell.
To find the element with this electron configuration, we count the total number of electrons: 2 + 2 + 6 + 2 + 2 = 14 electrons. Since silicon (Si) has 14 electrons, it matches the given electron configuration.
Silicon is a chemical element in the periodic table with atomic number 14. It is a metalloid, meaning it has properties of both metals and nonmetals. Silicon is widely used in various industries, including electronics, as it is a key component of semiconductors and is crucial for modern technology.
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The element is Silicon 14 Si
hope this helps!
(2) 2 (4) 4
Answers
Answer : The correct option is, (3) 3
Explanation :
The given molecule is, Ethyne
As we know that ethyne is an unsaturated hydrocarbon which contains triple bonds between the carbon-carbon atoms.
In unsaturated compounds, there are less number of hydrogen bonded with the carbon atoms.
The formula of ethyne molecule is,. In this molecule, there are triple bond is present between the two carbon atoms that means there are 3 pair of electrons present between the two carbon atoms.
Hence, there are 3 number of electron pairs that are shared between the two carbon atoms in a molecule of ethyne.
The structure of ethyne are shown below.
-linear
-trigonal planar
-tetrahedral
-trigonal bipyramidal
-octahedral
-bent (angular)
Answers
Covalent compound formed by sharing of electron and ionic compound formed by complete transfer of electron. Linear, tetrahedral and trigonal planar geometries would produce a nonpolar molecule.
What is chemical Compound?
Chemical Compound is a combination of molecule, Molecule forms by combination of element and element forms by combination of atoms in fixed proportion.
Using VSEPR and electron pair repulsion, we can easily find that linear, tetrahedral and trigonal planar geometries would produce a nonpolar molecule if we assume that all of the atoms attached to the central atom were identical. Any geometries which have center of symmetry will produce non polar molecule.
Therefore, linear, tetrahedral and trigonal planar geometries would produce a nonpolar molecule.
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linear
tetrahedral
trigonal planar
are all non polar molecules.
2H2O2 → 2H2O + O2
CaCO3 → CaO + CO2
2AgNO3 + Zn → 2Ag + Zn(NO3)2
Answers
Answer: The correct answer is
Explanation:
Synthesis reaction is defined as the reaction in which two smaller substances combine together to form a large single compound.
From the given options:
Option A:
This is a synthesis reaction and only one product is forming.
Option B:
This is a decomposition reaction.
Option C:
This is a decomposition reaction.
Option D:
This is a single displacement reaction.
Thus, the correct answer is
Final answer:
A synthesis reaction is a chemical reaction in which two or more substances combine to form a single, more complex substance. The correct synthesis reaction from the given options is 2H2 + O2 → 2H2O.
Explanation:
A synthesis reaction is a chemical reaction in which two or more substances combine to form a single, more complex substance.
In the given options:
- 2H2 + O2 → 2H2O is a combination reaction (synthesis) as hydrogen and oxygen combine to form water.
- 2H2O2 → 2H2O + O2 is a decomposition reaction as hydrogen peroxide breaks down into water and oxygen.
- CaCO3 → CaO + CO2 is a decomposition reaction as calcium carbonate decomposes into calcium oxide and carbon dioxide.
- 2AgNO3 + Zn → 2Ag + Zn(NO3)2 is a single displacement reaction as silver nitrate reacts with zinc to form silver and zinc nitrate.
Therefore, the correct answer is
2H2 + O2 → 2H2O
.
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